An old calculator uses a seven-segment display, in which numerals are represented by different patterns of vertical and horizontal line segments. But the device is faulty and no longer shows any ...

Aldeman: Disparities between the highest and lowest performers widened in every state in the last 2 years. But the pattern is ...

Last week’s winner was Roy Samuelson with A = 42 square units. Jeff Smith is a former Math teacher and a retired US Navy Lieutenant Commander. Reach him at [email protected].